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FOC | Family List | FOC Vol. 20-21 | Asteraceae | Petasites

4. Petasites rubellus (J. F. Gmelin) Toman, Folia Geobot. Phytotax. 7: 391. 1972.

长白蜂斗菜 chang bai feng dou cai

Tussilago rubella J. F. Gmelin, Syst. Nat., ed. 13[bis], 2: 1225. 1792; Nardosmia saxatilis Turczaninow; Petasites saxatilis (Turczaninow) Komarov.

Rhizomes repent, thin, with fibrous roots. Stem solitary, erect, 5-25 cm tall, simple, arachnoid in upper part. Basal leaves small, long petiolate; petiole 3-10 cm, densely crisped-pubescent, base slightly expanded; blade abaxially pale green, adaxially green, reniform or reniform-cordate, 3-5.5 × (4-)5-9 cm, thickly papery, with short, thick hairs on petiole and especially on veins abaxially, base slightly cordate, margin acutely toothed, teeth emarginate, apex rounded. Stem leaves scale-shaped, ovate-lanceolate, 1.5-2 × 0.5-1 cm, glabrous, shortly white ciliate on margin, parallel veined, basally amplexicaul, apically obtuse or slightly acute. Capitula 6-9, arranged in corymbs; peduncles 1-4(-6) cm, slender, with linear bractlets. Involucres conical, 8-10 × 5-10 mm; phyllaries biseriate, subequal, narrowly oblong, 1-1.5 mm wide, glabrous or nearly so, apically obtuse. Male florets few, sterile; corolla yellow, ca. 9 mm; tube 3.5-4 mm; limb campanulate, 5-denticulate, lobes ovate-oblong; style basally 2-fid, stigma branches clavate, apex acute, puberulent. Female florets white, 6-7 mm, shortly radiate, apically 2- or 3-denticulate. Achenes oblong, 3-3.5 mm, truncate, constricted at bases. Pappus of many fine bristles, white, 9-11 mm. Fl. and fr. May-Jul.

Alpine regions, adjacent forests, forest margins; 1800-2800 m. Jilin (Changbai Shan), Liaoning [Korea, Mongolia, Russia (Far East, Siberia)].


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